Transport for Wales 421D20
View line Transport for Wales
Alerts for train 421D20
Alerts are saved per line, not per trip id, so they keep working when the operator changes the timetable. This train runs on line Transport for Wales.
It does not run today
Last recorded run: Sunday 4 October โ1 min
The mini-map returns when the train runs
On-time ยท 30 days
100%
4/4 runs under 3 min
RT coverage: 4 full ยท 0 partial ยท 0 no data
On-time ยท 90 days
92%
11/12 runs under 3 min
RT coverage: 12 full ยท 0 partial ยท 0 no data
Typical delay
โ1min
Median at arrival, 90 days
P90
0min
9 in 10 runs arrive with less than this
Last 30 days
Delay at the end of each run, in minutes. One bar per run.
- On time (<3 min)
- 3โ10 min
- 10โ30 min
- 30+ min
- Partial coverage
- No data
Worst days
- Sun 9 Aug Max en route +9 min ยท last fix heading to 40028 +3 min
Distribution ยท 90 days
12 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 33% ยท 4
- On time 58% ยท 7
- 3โ10 min 8% ยท 1
- 10โ30 min 0% ยท 0
- 30+ min 0% ยท 0
On-time by weekday
- โ M n=0
- โ T n=0
- โ W n=0
- โ T n=0
- โ F n=0
- โ S n=0
- 92% S n=12
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Sun 4 Oct | 40031 18:09 | โ1 min | +4 min |
| Sun 27 Sept | Holyhead 18:10 | โ2 min | +4 min |
| Sun 20 Sept | Holyhead 18:12 | โ2 min | +4 min |
| Sun 13 Sept | Holyhead 18:08 | โ1 min | +9 min |
| Sun 6 Sept | Holyhead 18:26 | โ1 min | +6 min |
| Sun 30 Aug | Holyhead 17:54 | 0 min | +2 min |
| Sun 23 Aug | Holyhead 18:09 | โ1 min | +12 min |
| Sun 16 Aug | 40031 18:10 | 0 min | +2 min |
| Sun 9 Aug | 40028 18:13 | +3 min | +9 min |
| Sun 2 Aug | Holyhead 19:02 | 0 min | +4 min |
| Sun 26 Jul | Ty Croes 18:15 | โ6 min | +4 min |
| Sun 19 Jul | 40031 18:08 | โ2 min | +2 min |
Each run is closed into train_runs (country, train number, service day) from the live positions. Final delay = last delay seen. Partial coverage: the feed stopped before the final stop (last value used, hatched in the chart). No data: a run without any valid delay; counts as neither on time nor late. Data collected since 11 July 2026.